Friday Primetime Results:

· "Grimm" (1.2/4 in 18-49, 4.8 million viewers overall from 9-10:01 p.m. ET) built on its 18-49 lead-in by +71% in adults 18-49. "Grimm" held 86% of the prior week's 18-49 rating (1.2 vs. 1.4), pending updates, and is currently retaining 99% of its week-ago result in total viewers (4.844 million vs. 4.887 million). L+7 Time-Shifting: The March 21 "Grimm" grew in 18-49 rating by 70% in L+7 (2.64 vs. 1.55).

· "Hannibal" (0.8/3 in 18-49, 2.4 million viewers overall from 10:01-11 p.m. ET) is currently retaining 100% of its 18-49 rating from the prior week and is up week to week in total viewers by +10% (to 2.406 million from 2.179 million), pending updates. L+7 Time-Shifting: The March 21 "Hannibal" grew in 18-49 rating by 62% in L+7 (1.41 vs. 0.87).

· The NBC News Special "Brian Williams Reporting: 108 Hours: Inside the Hunt for the Boston Marathon Bombers" (0.7/3 in 18-49, 3.9 million viewers overall from 8-9 p.m. ET) grew from its first half-hour to its second in most key measures, including gains of +14% in adults 18-49 (to a 0.8 rating from a 0.7) and +10% in adults 25-54 (1.1 vs. 1.0).

In Late-Night Metered Markets Friday night:

· In Nielsen's 56 metered markets, household results were: "The Tonight Show Starring Jimmy Fallon," 3.0/7; CBS's "Late Show with David Letterman," 1.8/5 with an encore delayed by Masters golf coverage; and ABC's "Jimmy Kimmel Live," 2.2/5 with an encore.

· In the 25 markets with Local People Meters, adult 18-49 results were: "Tonight," 1.1/5; "Late Show," 0.3/2 with an encore delayed by Masters golf coverage; and "Jimmy Kimmel Live," 0.7/3 with an encore.

· From 12:35-1:05 a.m. ET, ABC's "Nightline" averaged a 1.6/5 in metered-market households and a 0.5/3 in 18-49 in the Local People Meters.

· From 12:35-1:35 a.m. ET, "Late Night with Seth Meyers" (1.5/5 in metered-market households with an encore) beat CBS's "Late Late Show with Craig Ferguson" (1.0/4 delayed by Masters golf coverage). In the 25 markets with Local People Meters, "Late Night" (0.5/3 in 18-49 with an encore) topped "Late Late Show" (0.2/2 delayed by Masters golf coverage).

· At 1:35 a.m., "Last Call with Carson Daly" averaged a 0.8/3 in metered-market households with an encore and a 0.3/2 in adults 18-49 in the 25 markets with local people meters.

NOTE: All ratings are "live plus same day" from Nielsen Media Research unless otherwise indicated.